I’m getting married and moving in with my finance after the wedding.

Greetings, My wife and I have three children and three grand children and not quite 60, we have lived most of our married lives out of the USA, (Mexico and Spain) but now living in McAllen Texas,  we both have some real estate experience, owned our own company in Spain selling apartments to northern Europeans,   went well until the bust in 2007 and 2008, we also had real estate license's in Florida and lived there for 4 years,   We now are wanting to do some serious REI  and learn, network in Southern Texas,  thanks for your input.  

.  :-)  I married into the business, but I was already primed for real estate investing from earlier endeavors.2.

Could a married couple split primary residences?

Yes it's tax free up to $500K of profit if you're married.  

Here's the scenario...We have a married couple who's interested in purchasing one of our houses.

I'm 29, married with two kids.

I assume you are not married yet, and when you do, it is likely much harder to convince your wife to house-hack.

Word to the wise , if you are not married buy the house solo with only you on the deed and loan. it isnt a done deal till you both say " I do" 

A 3rd party knowing that person's name, dob, ssn, where they live (not just what they say, but also their address according to tax returns, photo ID, paystubs, bank statements, etc), what their contact info is, who their spouse is if married, what other associates they might have as revealed  by joint bank accounts, what AKA names appear on their credit report, what OTHER addresses might show up on said credit report (often family members), car loan numbers that can be used to identify model/make/license plate of car to look out for, and so on.